Jack -
Very sad news - so sorry for your loss. Be strong in this difficult time, and know that many people are thinking of you and your father, and the difference he made in this world.
I never had the pleasure of meeting him, but from everything I have read on this board he was a good man, and you can be very proud to have called him your father. And no doubt, he was proud to have you as his son.
Peace to you.